Prostate specific antigen (PSA)


Boddy JL, Dev A, Pike DJ and Malone PR, 2004, BJU International, 93(6), 735-8 , Intra-individual variation of serum prostate specific antigen levels in men with benign prostate biopsies


Total Score


Parameter Score
1. Scale A
2. Study Population A
3. Samples A
4. Measurand B
5. Pre-Analytical A
6. Replicate Analysis A
7. Steady State C
8. Outlier Analysis C
9. Normality B
10. Variance Homogeneity C
12. CI A
13. No of Results C
14. Concentrations A
15. Total Score C7,8,10,11,13

Item Details

Parameter Score
Matrix Serum
Measurand Prostate specific antigen (PSA)
Unit ng / mL
Overall Analytical Principle Method Chemiluminescence
Number of Subjects 58
Number of Subjects included in BV estimation 58
Ethinicity Unknown
Age Mean / Median 66.6
Age Min 59.0
Age Max 80.0
Age SD
Number of Males 58
Number of Females 0
State of Well Being
Non-healthy (excl pregnant)
Study Duration Length 4
Study Duration Units Week
Sampling Intervals, e.g. X sample(s) per Interval Unit 1
Interval Units Week
Sampling Times Start Time:
End Time:
Number of Samples 4
Average Number of Samples Used for BV Estimation 4.0
Average Number of Replicates 1.0
Estimates of CVi 9.7
Calculated Confidence Intervals of CVi Lower: 7.87, Upper: 11.21
Estimates of CVg
Calculated Confidence Intervals of CVg Lower: , Upper:
Analytical CV 5.3
Calculated Confidence Intervals of Analytical CV Lower: 4.12, Upper: 7.43
Measurand Mean 6.3
Measurand Min
Measurand Max
Measurand SD